There is a spot in the Victoria Falls (a.k.a. Mosi-oa-Tunya, or “the Smoke that Thunders”) where the brave can test their courage against the slow but unyielding erosive power of the mighty Zambezi River. In the months of September and December, when the river’s water levels are low, it is possible to swim in a natural pool—nicknamed the Devil’s Pool—located at the very edge of the 360-foot falls. A natural rock wall slows the current in that spot and prevents swimmers from being swept over the precipice and into the gorge. At other times of the year, of course, the rock wall is too far underwater for anyone to swim safely.